Who am I supposed to be by 25?

What is expected of me? How mature am I supposed to be?

PLEASE DON'T GIVE BS LIKE "there's no timeline." There is.

What accomplishments should I have by then? What am I too old for? How independent should I be? What should I have done in my professional and personal life?

I feel like I'm starting from scratch. I feel like an overgrown teenager, and even the 18 year olds I meet have more to show for their lives than me. How am I supposed to catch up, mentally, professionally, and personally?